. >>> there are new reports the crash that killed actor paul walker may have been caused by a mechanical failure. vin diesel made a crash at -- stop at the crash site. walker was riding in a porsche carrera gt. the car may have been leaking steering fluid. the car slammed into a tree and a street lamp and burst into flames. authorities also say speed may also be a factor. >>> a car salesman in hayward is still in disbelief after a man posing as potential buyer drove off the lot in a luxury suv. the man and a friend walked on to the lot of empire auto sunday afternoon and said they were interested in a 2004 range rover and want today take it for a test driver. the salesman said he asked for a driver's license, and when one of the men walked out to get away, the other man shoved him, jumped in the suv and sped off. >> i actually tried to go after them. i grabbed the key from this car and i tried to chase them, and then i said it's not safe. >> the salesman was not seriously hurt. the $17,000 range rover is gray in color and has a dealer plate on the front. >>> a federal report says the com